| 摘要 |
PROBLEM TO BE SOLVED: To provide a ready mixed concrete pressurizing apparatus for a pile hole in which ready mixed concrete flowing into the vicinity of a pile head to be an upper side of the pile hole is pressurized towards an inner circumferential wall surface of the pile hole and spread out as large as a predetermined pile hole inner diameter, such that a predetermined pile outer diameter can be maintained even in the vicinity of the pile head after concrete is hardened.SOLUTION: An outer tube 12 is provided which is positioned at an outer circumferential side of an upper side of a reinforcing-bar (c) within a pile hole (a), a middle tube 13 is provided which is positioned at an inner circumferential side of the upper side of the reinforcing-bar (c), and ready mixed concrete circulation holes 12b, 13a are formed on circumferential side faces of the outer tube 12 and the middle tube 13, respectively. An inner tube 14 is provided which becomes a ready mixed concrete flow-in passage, the outer tube 12, the middle tube 13 and the inner tube 14 are connected integrally and between the middle tube 13 and the inner tube 14, a spiral inner blade 15 is provided in a vertical direction for pressurizing ready mixed concrete flowing into the vicinity of a pile head to be an upper side of the pile hole towards the inner circumferential wall surface of the pile hole during rotations. |
